The LC717A00AR is a high-performance, low-cost capacitance-digital-converter LSI for electrostatic capacitive touch sensor, especially focused on usability. It has 8 channels capacitance-sensor input. The built-in logic circuit can detect the state (ON/OFF) of each input and output the result. This makes it ideal for various switch applications. The calibration function is automatically performed by the built-in logic circuit during power activation or whenever there are environmental changes. In addition, since initial settings of parameters, such as gain, are configured, LC717A00AR can operate as stand-alone when the recommended switch pattern is applied. Also, since LC717A00AR has a serial interface compatible with I
C and SPI bus, parameters can be adjusted using external devices whenever necessary. Moreover, outputs of the 8-input capacitance data can be detected and measured as 8-bit data.

• Detection system: Differential capacitance detection (Mutual capacitance type)
• Input capacitance resolution: Can detect capacitance changes in the femto Farad order
• Measurement interval (8 differential inputs):
• 18ms (Typ) (at initial configuration),
• 3ms (Typ) (at minimum interval configuration)
• External components for measurement: Not required
• Current consumption: 320 µA (Typ) (V
• = 2.8 V), 740 µA (Typ) (V
• = 5.5 V)
• Supply voltage: 2.6 V to 5.5 V
• Detection operations: Switch
• Interface: I
• C compatible bus or SPI selectable.